Vulnerable Systems:
* Apple Safari before 6.2.8, 7.x before 7.1.8, and 8.x before 8.0.8, as used in iOS before 8.4.1

Immune Systems:
* Apple Safari after 8.0.8, as used in iOS after 8.4.1

WebKit is prone to multiple security-bypass vulnerabilities. An attacker can exploit these issues to bypass certain same-origin policy restrictions and perform unauthorized actions in the affected application, which may aid in further attacks.